The York Factory Express was like a big, long train with lots of people and horses that traveled really far a long time ago. It was used to bring things like furs and supplies from one place to another. The route that the York Factory Express took was very long and went through lots of different places, like forests and rivers. The journey was very dangerous, and the people on the York Factory Express had to be very strong and brave to make it all the way to their destination without getting hurt or lost. Nowadays, we don't use the York Factory Express anymore, but we still remember it as an important part of history.